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2002 GMC Sierra Battery draining

Tiny
GMC02
  • MEMBER
  • 2002 GMC SIERRA
  • V8
  • 4WD
  • AUTOMATIC
  • 163,000 MILES
While jump starting the vehicle. The heater/a/c fan will run with no keys in the ignition. Have a circuit draining the battery. Only problem before heater speed control only worked on position 5. Removed fuse from blower (heater and A/C). Vehicle starts but must keep rev's up as it will stall out.
Hope you can help.
Dave
Ottawa, Canada
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Sunday, December 7th, 2008 AT 8:02 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
2002 GMC Sierra Battery draining

Get an ammeter and do below this the only way to find what's draining the battery. Heater only works on no.5 test the blower motor reistor it controls the speed of the blower motor thru resistances.
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Sunday, December 7th, 2008 AT 8:58 AM

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